# -*- coding: utf-8 -*-
#
# Numeric range in regex.
# Copyright (c) 2010, Nycholas de Oliveira e Oliveira <nycholas@gmail.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# # Redistributions of source code must retain the above copyright notice,
#    this list of conditions and the following disclaimer.
# # Redistributions in binary form must reproduce the above copyright notice,
#    this list of conditions and the following disclaimer in the documentation
#    and/or other materials provided with the distribution.
# # Neither the name of the Nycholas de Oliveira e Oliveira nor the names of
#    its contributors may be used to endorse or promote products derived from
#    this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
import re

def port_ranges(n):
    '''Ports to be scanned must be between 0 and 65535 inclusive.

    >>> port_ranges(0)
    True
    >>> port_ranges(65535)
    True
    >>> port_ranges(65536)
    False
    >>> port_ranges(-1)
    False
    '''
    m = re.findall(r'^([0-9]|[0-9]{2}|[0-9]{3}|[0-9]{4}|[0-6][0-5][0-5][0-3][0-5])$', str(n))
    return True if m else False


if __name__ == '__main__':
    import doctest
    doctest.testmod()